We’ve been in Bangkok many times and this is one of the best alternatives to hotels.
Location - easy walk to Chong Nonsi skytrain, Sathorn bus terminal, bus stop right outside. Easy to locate. Lots of local food options around, there’s 7-11 as well. Nearby massage place (open until 10pm). Short ride to Saphan Taksin/Sathorn pier and Siam area.
Space - very spacious for four adults. Rooms are comfortable. Full amenities in kitchen though we didn’t cook as there are a lot of local food options nearby. Spacious service area with washer and dryer - didn’t use as well but nice to have the option.
Klass is very responsive to messages, very helpful. Great value for money. Will definitely recommend and will definitely book when coming again to Bangkok.